VC 实现文件关联
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VC/MFC 设置程序与文件关联与双击文件获取文件路径(2008-10-10 10:59:15)
分类:编程技术标签:vc/mfc设置程序与文件关联双击
文件获取文件路径it
如何设置程序与文件关联并且双击关联文件时获取文件的路径呢?
一般来说可以通过写注册表的方式实现,在函数入口处实现功能。
例如在VC/MFC中,可以在应用程序的C**App.cpp文件中InitInstance()函数中实现该功能。#include
using namespace std;
//关联文件的后缀名,如"txt"、"doc"等
string m_csExtension;
string m_csShellOpenCommand;
string m_csDocumentShellOpenCommand;
//注册表中文件夹类名
string m_csDocumentClassName;
//关联文件的默认图标
string m_csDocumentDefaultIcon;
///////赋值函数//////
void SetExtension( LPCTSTR szExtension )
{
m_csExtension = szExtension;
}
void SetShellOpenCommand( LPCTSTR szShellOpenCommand )
{
m_csShellOpenCommand = szShellOpenCommand;
}
void SetDocumentShellOpenCommand( LPCTSTR szDocumentShellOpenCommand )
{
m_csDocumentShellOpenCommand = szDocumentShellOpenCommand;
}
void SetDocumentClassName( LPCTSTR szDocumentClassName )
{
m_csDocumentClassName = szDocumentClassName;
}
void SetDocumentDefaultIcon( LPCTSTR szDocumentDefaultIcon )
{
m_csDocumentDefaultIcon = szDocumentDefaultIcon;
}
///////赋值函数//////
//////关键函数:实现写注册表的函数////////
BOOL SetRegistryValue(
HKEY hOpenKey,
LPCTSTR szKey,
LPCTSTR szValue,
LPCTSTR szData
){
// validate input
if( !hOpenKey || !szKey || !szKey[0] ||
!szValue || !szData ){
::SetLastError(E_INVALIDARG);
return FALSE;
}
BOOL bRetVal = FALSE;
DWORD dwDisposition;
DWORD dwReserved = 0;
HKEY hTempKey = (HKEY)0;
// length specifier is in bytes, and some TCHAR
// are more than 1 byte each
DWORD dwBufferLength = lstrlen(szData) * sizeof(TCHAR);
// Open key of interest
// Assume all access is okay and that all keys will be stored to file
// Utilize the default security attributes
if( ERROR_SUCCESS == ::RegCreateKeyEx(hOpenKey, szKey, dwReserved, (LPTSTR)0, REG_OPTION_NON_VOLATILE, KEY_SET_VALUE, 0,
&hTempKey, &dwDisposition) ){
// dwBufferLength must include size of terminating nul
// character when using REG_SZ with RegSetValueEx function
dwBufferLength += sizeof(TCHAR);
if( ERROR_SUCCESS == ::RegSetValueEx(hTempKey, (LPTSTR)szValue, dwReserved, REG_SZ, (LPBYTE)szData, dwBufferLength) ){
bRetVal = TRUE;
}
}
// close opened key
if( hTempKey ){
::RegCloseKey(hTempKey);
}
return bRetVal;
}
BOOL RegSetExtension(void)
{
if( m_csExtension.empty() )
{
return FALSE;
}
std::string csKey = "." + m_csExtension;
SetRegistryValue(HKEY_CLASSES_ROOT, csKey.c_str(), "", m_csDocumentClassName.c_str());
if( !m_csShellOpenCommand.empty() )
{
csKey += "\\shell\\open\\command";
SetRegistryValue(HKEY_CLASSES_ROOT, csKey.c_str(), "", m_csShellOpenCommand.c_str());
}